Can my grandma take me from my dad?

I'm 16 now and live with my dad. My mom walked out on us when I was a baby. She's around but doesn't want go see us. I have never really met my mom but I've met a maternal grandma. She's okay. But she messaged saying she's gonna get custody of me and take me from my dad because she doesn't like how he has me living. Me and my father live the RV life because he's a traveling photographer. I help him at his events and he even pays me. I'm home schooled through this online program and my dad makes sure I'm on top of my homework. Last year I had all A's and one B. I do move around a lot but I make so many friends everyone in different states. We even traveled to Canada. Sure its been harder during covid, but my dad has instead been editing videos for people to stay a float and we've done great. I love my life. My maternal grandmother only talks to me once every few months so Idk why she's doing this. Can she really take me from my daddy😞